In Fl. Taiwan (ed. 2, 4: 297. 1998) Liu and Yang reported the plants there are evergreen. Y. Z. Ruan (in FRPS 71(2): 159. 1999) described the leaf blades as unequal and gave measurements for large ones and small ones without further explanation. All other authors reported this species to be generally isophyllous, which corresponds to specimens seen. The leaf description by Ruan may apply to the variable leaf sizes along the stems of some plants, rather than consistent size differences between the two leaves at a single stem node.